JPH04167257A - Recorder/reproducer - Google Patents

Abstract

PURPOSE:To increase recording capacity per recording track and to simplify a system configuration by guiding a tapelike recording medium by a guide member layer having a circular-arc-like inner periphery and provided externally opposed to a drum device. CONSTITUTION:A tapelike recording medium 12 is wound obliquely to a longitudinal direction on a drum device 13 for placing a recording or reproducing head, and transported along the drum surface 13A of the device 13 to record or reproduce information on the medium 12. Here, a guide member 21 having a circular-arc-shaped inner periphery 21A of a circular shape concentrically with the surface 13A is provided out of the device 13 to guide the transportation of the medium 12 is provided. As a result, even if a winding angle is large, feeding of the tape 12 is stabilized, and hence a recording track can be formed long obliquely to the tape 12. Thus, a recording capacity per one track of the recording track can be remarkably increased, and a system configuration can be entirely simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a recording/reproducing apparatus, and is suitable for application to, for example, recording/reproducing predetermined information on a tape-shaped recording medium.

B. Summary of the Invention The present invention provides a recording/reproducing device in which a tape-shaped recording medium wound obliquely around a drum device is guided by a guide member having an arc-shaped inner circumferential surface and facing the outside of the drum device. By recording or reproducing information on the recording medium by guiding the recording medium, it is possible to form a longer recording track on the recording medium. As a result, the recording capacity per recording track can be further increased, the number of heads can be reduced, and the overall system configuration can be further simplified.

C. Prior Art Conventionally, a video tape recorder 1 of this type has a head drum 2, as shown in FIG. The head drum 2 has a disk shape, and four magnetic heads 2A, 2B, 2C and 2D are arranged on the circumference with a diameter of 90''.
They are mounted at angular intervals of .

A tape guide 5 having a semi-circular inner circumferential surface is disposed at a position facing the outer circumferential surface of the head drum 2 .

The tape guide 5 is directed in the direction of the rotating shaft 4 (direction shown by arrow A)
When the magnetic tape 6 being run is attracted, it is curved in the width direction along the inner peripheral surface of the tape guide 5, and the head drum 2
It is pressed against the outer circumferential surface of the

Here, as shown in FIG. 6, the tape guide 5 has suction grooves 5A and 5B bored in parallel along the inner circumferential surface, and a suction hole 5C passes through the suction grooves 5A and 5B.
is formed.

Also, tape guide 5 has two magnetic heads, 2B.

A groove 5D is provided in the circumferential direction at a position facing 2C and 2D so that the two magnetic heads 2B, 2C and 2D protruding from the head drum 2 slide with an appropriate pressing force.

As a result, the magnetic tape 6 running from the supply reel to the take-up reel is run along the inner circumferential surface of the tape guide 5 by the airflow sucked through the suction grooves 5A, 5B and the suction hole 5C, and is also used for recording. Track is magnetic head 2A, 2
B, 2C and 2D are sequentially formed in the width direction.

D Problems to be Solved by the Invention However, in the video tape recorder 1, the length of the recording tracks sequentially formed on the magnetic tape 6 is limited to the length in the width direction. Therefore, there is a problem that the recording capacity per channel is small, and in order to increase the recording capacity, it is necessary to increase the number of heads, making the control system complicated.

The present invention has been made in consideration of the above points, and aims to propose a recording/reproducing apparatus having a large recording capacity per recording track and a simpler system configuration.

E Means for Solving the Problem A tape-shaped recording medium 12 is wound obliquely in the longitudinal direction around a drum device 13 equipped with recording or reproducing heads 18A and 18B, and is caused to run along a drum surface 13A of the drum device 13. Accordingly, in the recording and reproducing apparatus 10 that records or reproduces information on the recording medium 12, an arc-shaped inner circumferential surface 2 that is concentric with the drum surface 13A is provided on the outside of the drum device 13.
1A and guides the traveling of the recording medium 12
1.

F action The running state of the recording medium 12 is changed by guiding the running tape-shaped recording medium 12 diagonally in the longitudinal direction relative to the drum device 13 by the guide member 21 having the arcuate inner circumferential surface 21A and recording or reproducing information. In addition, the recording track can be formed obliquely and long in the longitudinal direction of the recording medium 12.

Thereby, the recording/reproducing device 13 can further increase the recording capacity per recording track formed on the recording medium 12, and the overall system configuration can be further simplified.

G example An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, 10 indicates a video tape recorder as a whole, and a magnetic tape 1 drawn out from a supply reel 11.
2 through the drum device 13 and then the capstan motor 14
The film is pinched from both sides by a capstan 15 and a pinch roller 16, which are rotationally driven by the motor, and is sent to a winding wheel 17.

The drum device 13 includes cylindrical upper and lower fixed drums 19 and 20 that are fixed to each other by a coupling member (not shown) and stacked on top and bottom so as to sandwich a rotating disk 18 therebetween.
have.

A pair of magnetic heads 18A and 18B are mounted on the circumference of the rotating disk 18 at angular positions separated by 180 degrees.

A concave guide 21 is provided on the outer peripheral side of the drum device 13.

The concave guide 21 sandwiches the magnetic tape 2 in the longitudinal direction between the inner surface 21A and the drum surface 13A of the drum device 13,
Travel is guided along the drum surface 13A.

Here, the concave guide 21 is connected to the drum surface 13 of the drum device 13.
It has an inner circumferential surface 21A having an arc shape approximately equal to A,
It is arranged so as to coincide with the rotation center of the drum device 13.

The inner circumferential surface 21A has an angular range that almost covers and surrounds the drum surface 13A, and the feeding side end 21B and sending side end 21C of the magnetic tape 12 have a semi-cylindrical shape so as not to damage the magnetic tape 12. There is.

Further, the magnetic tape 12 is attached to the rotating disk 1 on the inner circumferential surface 21A.
A plurality of lead pins 22 are provided so as to protrude toward the inner circumferential side from the inlet end 21B to the outlet end 21C so as to be guided obliquely across the rotational direction of the lead 8.

Further, on the upper part of the inner peripheral surface 21A of the concave guide 21, a tape presser 23 made of a spring with a small spring constant is provided above the lead pin 22 by the width of the tape.
is pressed against the lead pin 22 from above.

A head relief groove 2LD is provided on the inner peripheral surface 21A of the concave guide 21 along the surface facing the rotating disk 18.
Magnetic heads 18A and 1 protrude from the rotating disk 18
8B can slide the magnetic tape 12 along the escape groove 21D with an appropriate pressing force.

Further, a spiral groove (hereinafter referred to as a spiral group) is formed on the surface of the magnetic tape 12 facing the fixed drums 19 and 20.

As a result, the magnetic tape 12 is pressed against the concave guide 21 by the airflow generated from a spiral group when the rotating disk 18 rotates at high speed and output through the gap between the rotating disk 18 and the fixed drums 19 and 20. being done.

In the above configuration, the magnetic tape 12 is connected to the drum device 13.
When the capstan 14 and the pinch roller 15 start running after being attached to the concave guide 21, an air layer (hereinafter referred to as an air film) formed by an air flow blown out by the rotation of the rotating disk 18 It is pushed out toward the inner peripheral surface 21A side of the concave guide 21.

At this time, as shown in FIG. 3, the magnetic tape 12 is mounted on a drum. &13 along the inner circumferential surface 21A of the concave guide 21, which is disposed so as to substantially cover and surround the concave guide 21, is supported by the lead pin 22, and travels diagonally while being guided by being pressed from above by the tape presser 23.

As a result, even when the wrapping angle is large, the magnetic tape 12
The running becomes stable.

On the magnetic tape 12 guided by the concave guide 21, there is a magnetic head 18A that rotates at high speed facing the relief groove 21D.
and 18B, recording tracks are sequentially formed.

At this time, the magnetic tape 12 is wound around the drum device 13 over a large angular range in the longitudinal direction, and the inclination angle of the magnetic tape 12 is small, so that recording tracks are formed obliquely long with respect to the magnetic tape 12.

As a result, the recording capacity per recording track becomes much larger than in the past.

According to the above configuration, the drum surface 13A of the drum device 13
A concave guide 21 having a concentric arc-shaped inner peripheral surface 21A is provided near the outer periphery of the magnetic tape 12 wound in the longitudinal direction.
The outer peripheral surface 1 of the drum device 13 is guided by the concave guide 21.
By running along line 3A, the recording track can be made much longer.

As a result, the recording capacity per track can be increased, and as a result, the number of magnetic heads can be reduced, and the system configuration can be simplified as a whole.

Further, since the running state of the magnetic tape can be stabilized by the concave guide 21, the selection range of running speed is widened, and information can be reliably recorded and reproduced even when the magnetic tape 12 is run at a low speed.

In the above embodiment, a case has been described in which the magnetic tape 12 is pushed toward the concave guide 21 by the airflow generated by the spiral group formed on the rotating disk 18, but the present invention is not limited to this. As shown in the figure, a suction hole 26 consisting of a plurality of small holes is provided on the inner circumferential surface 25A side of the concave guide 25, and the magnetic tape 12 is attracted to the concave guide 22 side through the suction hole 26 while running. It is also possible to do so (Fig. 4).

Further, in the above-described embodiment, a case was described in which a concave guide 21 having an angular range that almost wraps around the drum device 13 is provided, but the present invention is not limited to this, and the present invention is not limited to this. It can be applied to the guide 21.

Furthermore, in the above-described embodiment, a case was described in which a plurality of bins 22 and a tape presser 23 were arranged on the inner circumferential surface 21A of the concave guide 21 to guide the running of the tape, but the present invention is not limited to this. Alternatively, the guide path may be formed by providing an oblique step on the inner circumferential surface 21A.

Further, in the above-described embodiment, a case has been described in which the magnetic tape 12 is wound up by the capstan 15 and the pinch roller 16 provided on the winding reel 17 side, but the present invention is not limited to this. It may be made to run along the inner circumferential surface 21A of the concave guide 21 using the capstan 15 and the pinch roller 16 provided on the 11 side. In this case, the tape is run along the inner peripheral surface 21A of the concave guide 21, and the recording surface side of the tape is not in contact with the drum surface 13A, so that fatigue of the tape due to sliding contact with the drum surface 13A can be further reduced. can.

Furthermore, in the embodiment described above, the pair of magnetic heads 18
Although the case of having A and 18B has been described, the present invention is not limited to this, and can be widely applied to cases of, for example, 4 heads.

Furthermore, in the above-described embodiment, a case has been described in which an air flow is generated by the spiral group formed on the rotating disk 18, and an air film is formed between the magnetic tape 12 and the drum surface 13A. Not limited to
An air flow may be generated using a fin or the like attached to the rotating shaft of the drum device 13 and blown onto the magnetic tape 12 .

Furthermore, in the above-mentioned embodiment, the drum device 13 has a structure in which the rotating disk 18 is sandwiched between two fixed drums 19 and 20 and stacked (the case is described in which it is applied to a so-called middle drum rotating type drum device, but the present invention Instead of this, the invention may be applied to a drum device having a head drum above the lower fixed drum 20 (a so-called upper drum rotating type drum device).

Further, in the above-described embodiment, a case has been described in which the concave guide 21 is attached to the drum device 13 equipped with the magnetic heads 18A and 18B, but the present invention is not limited to this, and the present invention is not limited to this. It may also be applied when running an optical tape.

H Effects of the Invention As described above, according to the present invention, a guide member having an arc-shaped inner circumferential surface concentric with the drum surface is disposed on the outside of a drum device formed by winding a tape-shaped recording medium in the longitudinal direction. However, by guiding the running of the recording medium by the guide member, the running of the recording medium can be stabilized, and the recording track can be formed obliquely and long. As a result, the recording capacity per recording track can be made much larger than in the past, and the system configuration can be further made into parts.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a recording/reproducing apparatus according to the present invention, FIG. 2 is a perspective view showing the configuration of a concave guide, FIG. 3 is a plan view for explaining the running of a magnetic tape, and FIG. 5 is a plan view for explaining another embodiment, FIG. 5 is a perspective view for explaining a conventional recording/reproducing apparatus, and FIG. 6 is a partial cross-sectional view for explaining its operation. 1.10...Video tape recorder, 13...
...Drum device, 18...Rotating disk,
19.2゜...Fixed drum, 21...
Concave guide, 22...S-do pin, 23...
・Tape presser.

Claims (1)

[Claims] A tape-shaped recording medium is wound obliquely in the longitudinal direction around a drum device equipped with a recording or reproducing head, and the tape-shaped recording medium is rolled onto the recording medium by running it along the drum surface of the drum device. The recording/reproducing device for recording or reproducing information includes a guide member provided on the outside of the drum device, the guide member having an arcuate inner circumferential surface concentric with the drum surface and guiding the traveling of the recording medium. A recording/playback device with special features.